I also work in the field. While this assessment was pretty on point 10 years ago, particularly regarding security, I think the modern reality is a lot more nuanced.

For example, the secure enclave (present since the iPhone 5S, and Macs with a T1 or newer) still hasn’t been fully broken. FIrmware has been dumped, and vulnerabilities found, but nothing publicly that is able to decrypt private keys held inside.